Dual shelving unit



FIG. 1 is an isometric view of dual shelving unit, incorporating my new design;

FIG. 2 is an end elevation view;

FIG. 3 is an opposite end elevation view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines shown are for illustrative purposes only and form no part of the claimed design. 

The ornamental design of a dual shelving unit, as shown and described. 